jgg     2008 28 (1):  109-113    ISSN: 0412-1961  CN: 21-1139/TG GEODETIC INVERSION THEORY CONSTRAINED WITH INEQUALITY Wang Leyang ; and Zhu Jianjun Department of Surveying and Geomatics, School of Info-Physics and Geomatics Engineering, Central South University, Changsha 410083 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null